EP1885094A3 - Quadrature demodulator - Google Patents

Quadrature demodulator Download PDF

Info

Publication number
EP1885094A3
EP1885094A3 EP07014823A EP07014823A EP1885094A3 EP 1885094 A3 EP1885094 A3 EP 1885094A3 EP 07014823 A EP07014823 A EP 07014823A EP 07014823 A EP07014823 A EP 07014823A EP 1885094 A3 EP1885094 A3 EP 1885094A3
Authority
EP
European Patent Office
Prior art keywords
signal
signals
data
quadrature demodulator
specific pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07014823A
Other languages
German (de)
French (fr)
Other versions
EP1885094B1 (en
EP1885094A2 (en
Inventor
Sadatoshi Oishi
Nobuo Murofushi
Masakazu Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba TEC Corp
Original Assignee
Toshiba TEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba TEC Corp filed Critical Toshiba TEC Corp
Publication of EP1885094A2 publication Critical patent/EP1885094A2/en
Publication of EP1885094A3 publication Critical patent/EP1885094A3/en
Application granted granted Critical
Publication of EP1885094B1 publication Critical patent/EP1885094B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation

Abstract

A quadrature demodulator includes a reception means section (RX), which receives a signal transmitted by an RFID tag and containing a specific pattern followed by data, and multiplies the received signal by a local signal to generate an I-signal and a Q-signal, a first demodulating circuit which squares the I- and Q-signals and adds the resulting signals together to generate data, a second demodulating circuit (RP2) which detects the specific pattern in the I- and Q-signals to decode the data, and a control section (1) which selects one of the first and second demodulating circuits (RP1,RP2) in accordance with a gain determined by the result of the addition of the values of the squared I- and Q-signals.
EP07014823A 2006-07-31 2007-07-27 Quadrature demodulator Expired - Fee Related EP1885094B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006208835 2006-07-31

Publications (3)

Publication Number Publication Date
EP1885094A2 EP1885094A2 (en) 2008-02-06
EP1885094A3 true EP1885094A3 (en) 2009-06-24
EP1885094B1 EP1885094B1 (en) 2010-08-25

Family

ID=38659387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014823A Expired - Fee Related EP1885094B1 (en) 2006-07-31 2007-07-27 Quadrature demodulator

Country Status (4)

Country Link
US (1) US7619466B2 (en)
EP (1) EP1885094B1 (en)
CN (1) CN101119358B (en)
DE (1) DE602007008651D1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100814002B1 (en) * 2006-06-29 2008-03-14 삼성전자주식회사 Data recovery method and apparatus for radio frequency identification
JP4272236B2 (en) * 2007-03-14 2009-06-03 東芝テック株式会社 Wireless tag communication device
JP5464418B2 (en) * 2009-10-19 2014-04-09 ソニー株式会社 DEMODULATION DEVICE AND METHOD, AND ELECTRONIC DEVICE
WO2011077480A1 (en) 2009-12-22 2011-06-30 株式会社 東芝 Radio apparatus
JP5225474B2 (en) 2009-12-22 2013-07-03 株式会社東芝 Wireless device
JP2014052868A (en) * 2012-09-07 2014-03-20 Canon Inc Information processing apparatus, program, and control method
US9948127B2 (en) * 2015-07-13 2018-04-17 Nxp B.V. Voltage supply compensation
JP7261077B2 (en) * 2019-04-23 2023-04-19 日本電波工業株式会社 PLL device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594651A (en) * 1969-10-15 1971-07-20 Communications Satellite Corp Quadriphase modem
US6501807B1 (en) * 1998-02-06 2002-12-31 Intermec Ip Corp. Data recovery system for radio frequency identification interrogator
EP1557962A1 (en) * 2002-10-28 2005-07-27 Mitsubishi Denki Kabushiki Kaisha Diversity reception device and diversity reception method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349332A (en) * 1992-10-13 1994-09-20 Sensormatic Electronics Corportion EAS system with requency hopping
US5649296A (en) * 1995-06-19 1997-07-15 Lucent Technologies Inc. Full duplex modulated backscatter system
US5777561A (en) * 1996-09-30 1998-07-07 International Business Machines Corporation Method of grouping RF transponders
US5784686A (en) * 1996-12-31 1998-07-21 Lucent Technologies Inc. IQ combiner technology in modulated backscatter system
US6122329A (en) * 1998-02-06 2000-09-19 Intermec Ip Corp. Radio frequency identification interrogator signal processing system for reading moving transponders
US6127884A (en) * 1999-05-24 2000-10-03 Philips Electronics North America Corp. Differentiate and multiply based timing recovery in a quadrature demodulator
JP3839212B2 (en) * 2000-02-04 2006-11-01 三菱電機株式会社 Timing reproduction apparatus and demodulator
CN1794594A (en) * 2005-12-31 2006-06-28 清华大学 Front-ene circuit of two-step double-orthogonal zero medium frequency structure receiver of global digital broadcasting
JP4676358B2 (en) * 2006-02-27 2011-04-27 東芝テック株式会社 Quadrature demodulator and interrogator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594651A (en) * 1969-10-15 1971-07-20 Communications Satellite Corp Quadriphase modem
US6501807B1 (en) * 1998-02-06 2002-12-31 Intermec Ip Corp. Data recovery system for radio frequency identification interrogator
EP1557962A1 (en) * 2002-10-28 2005-07-27 Mitsubishi Denki Kabushiki Kaisha Diversity reception device and diversity reception method

Also Published As

Publication number Publication date
DE602007008651D1 (en) 2010-10-07
EP1885094B1 (en) 2010-08-25
US20080024208A1 (en) 2008-01-31
US7619466B2 (en) 2009-11-17
CN101119358B (en) 2011-01-19
CN101119358A (en) 2008-02-06
EP1885094A2 (en) 2008-02-06

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